The slave is usually strictly forbidden from placing their lips directly on the body of the dominant so the practice routinely involves them receiving much of the spray all over their face, hair and body, however, another way of doing this that applies mostly to male dominants, is to place the mouth on the head of the penis and drink the urine as it is released. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. Threesome or 3some pornography features one man and two women . Lying face down one may use the hands, one may straddle a pillow, the corner or edge of the bed, a partner leg or some scrunched-up clothing and hump the vulva and clitoris against it. Such documents have not been recognized as being legally binding, nor are they intended to be. Biological anthropologist Helen B. However, gay pornography in the modern world is mostly concentrated in the making of home videos , cable broadcast and emerging video on demand and wireless markets, as well as images and movies for viewing on the Internet. Women with women Main article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience. They may regard it as an enhancing element of their sex lives or as their primary form of sexual activity. The mouth was the most common area to be ejaculated upon. The cover can have hinges or be a separate part. While some fantasize about a giantess who is slightly taller than himself, others are interested in giantesses that are hundreds or even thousands of feet tall. Real school shots or videos which are sexualized may violate privacy laws in some gay twinks countries. The introduction of the home video and Internet saw a boom in the worldwide porn industry momporn that generates billions anime hentai of dollars annually.